• Country
• Germany

• Manufacturer / Brand
• Teladi; Düsseldorf

• Year
• 1954/1955

• Category
• Microphone or Pick-up element

• Radiomuseum.org ID
• 97063

• • alternative name: Diederichs & Kühlwein

• Number of Tubes
• 2

• Valves / Tubes
• EF40 EF40

• Wave bands
• - without

• Power type and voltage
• Powered by external power supply or a main unit.

• Material
• Metal case

• from Radiomuseum.org
• Model: K500 [Achter] - Teladi; Düsseldorf

• Dimensions (WHD)
• 58 x 210 x 58 mm / 2.3 x 8.3 x 2.3 inch

• Notes
• Kondensator-Mikrofon mit Achtercharakteristik; 30-20000 Hz; Empfindlichkeit 30 mV/µb; Tropenfest.

• Net weight (2.2 lb = 1 kg)
• 0.8 kg / 1 lb 12.2 oz (1.762 lb)

• Price in first year of sale
• 487.00 DM

• Source of data
• HdB d.Rdf-& Ferns-GrH 1954/55

• Author
• Model page created by Bernd P. Kieck. See "Data change" for further contributors.

• Other Models

• Here you find 105 models, 64 with images and 4 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Teladi; Düsseldorf